@mixin wh($w, $h) {
  width: $w;
  height: $h;
}
.center {
  display: flex;
  align-items: center;
  justify-content: center;
}
.baidu-box {
  @include wh(654px, 50vh);
  margin: 0 auto;
  .title {
    font-size: 26px;
    font-weight: 800;
    color: #4e6ef2;
    text-align: center;
    line-height: 50px;
  }
}